Daewoo KOR-6Q2B5S service manual Troubleshooting Guide

TROUBLESHOOTING GUIDE

Following the procedure below to check if the oven is defective or not.

1.Check grounding before trouble checking.

2.Be careful of the high voltage circuit.

3.Discharge the high voltage capacitor.

4.When checking the continuity of the switches, fuse or high voltage transformer, disconnect one lead wire from these parts and check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.

NOTE : When electric parts are checked, be sure the power cord is not inserted the wall outlet.

Check wire harness, wiring and connected of the terminals and power cord before check the parts listed below.

(TROUBLE 1) Oven does not operate at all ; any inputs can not be accepted.

CONDITION

Fuse blows.

CHECK	RESULT
Check continuity of interlock	Continuity
monitor switch with door closed
	No Continuity

CAUSE

Malfunction of interlock moni- tor switch

REMEDY

Replace

NOTE 1

Check continuity of both primary
	No Continuity
and secondary interlock switch		Malfunction of
		interlock switch
with door colosed	Continuity
Check continuity of primary inter-	Continuity	Shorted con-
lock switch contact with door		tacts of primary
partially open until interlock mon-		interlock switch.
itor switch contact close
(COM NO)
Check continuity of primary	0 or infinite	Defective low
winding of low voltage trans-		voltage trans-
	Approx.
former		former
	150~310
	(normal)
Disconnect high voltage fuse	Fuse again	Defective low
	blows
		voltage trans-
and operate the unit
		former

Replace

NOTE 1

Replace

NOTE 1

Replace

Replace

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